Class v.c.a.a.AbstractFixedPointDecimal(integer):

Part of vmc.contrib.axiom.attributes View In Hierarchy

Known subclasses: vmc.contrib.axiom.attributes.point10decimal, vmc.contrib.axiom.attributes.point1decimal, vmc.contrib.axiom.attributes.point2decimal, vmc.contrib.axiom.attributes.point3decimal, vmc.contrib.axiom.attributes.point4decimal, vmc.contrib.axiom.attributes.point5decimal, vmc.contrib.axiom.attributes.point6decimal, vmc.contrib.axiom.attributes.point7decimal, vmc.contrib.axiom.attributes.point8decimal, vmc.contrib.axiom.attributes.point9decimal

Attribute representing a number with a specified number of decimal
places.

This is stored in SQLite as a binary integer multiplied by (10**N) where N
is the number of decimal places required by Python.  Therefore, in-database
multiplication, division, or queries which compare to integers or
fixedpointdecimals with a different number of decimal places, will not
work.  Also, you cannot store, or sum to, fixed point decimals greater than
(2**63)/(10**N).

While L{ieee754_double} is handy for representing various floating-point
numbers, such as scientific measurements, this class (and the associated
Python decimal class) is more appropriate for arithmetic on sums of money.

For more information on Python's Decimal class:

    http://www.python.org/doc/current/lib/module-decimal.html

and on general computerized Decimal math in general:

    http://www2.hursley.ibm.com/decimal/decarith.html

This is currently a private helper superclass because we cannot store
additional metadata about column types; maybe we should fix that.

@cvar decimalPlaces: the number of points of decimal precision allowed by
the storage and retrieval of this class.  *Points beyond this number
will be silently truncated to values passed into the database*, so be
sure to select a value appropriate to your application!
Method __init__ Undocumented
Method infilter used to convert a Python value to something that lives in the database;
Method outfilter used to convert an SQL value to something that lives in memory; so
Method compare Override this in a subclass.

Inherited from SQLAttribute (via integer):

Method computeDefault Undocumented
Method reprFor Undocumented
Method getShortColumnName
Method getColumnName
Method prepareInsert Override this method to do something to an item to prepare for its
Method coercer must return a value equivalent to the data being passed in for it to be
Method requiredSlots Undocumented
Method fullyQualifiedName
Method __repr__ Undocumented
Method type Undocumented
Method __get__
Method loaded Undocumented
Method _convertPyval Convert a Python value to a value suitable for inserting into the database.
Method __set__ Undocumented

Inherited from _ContainableMixin (via integer, SQLAttribute, Comparable):

Method oneOf Choose items whose attributes are in a fixed set.
Method notOneOf Undocumented

Inherited from _ComparisonOperatorMuxer (via integer, SQLAttribute, Comparable):

Method __eq__ Undocumented
Method __ne__ Undocumented
Method __gt__ Undocumented
Method __lt__ Undocumented
Method __ge__ Undocumented
Method __le__ Undocumented

Inherited from _MatchingOperationMuxer (via integer, SQLAttribute, Comparable):

Method _like Undocumented
Method like Undocumented
Method notLike Undocumented
Method startswith Undocumented
Method endswith Undocumented

Inherited from _OrderingMixin (via integer, SQLAttribute, Comparable):

Method _asc Undocumented
Method _desc Undocumented
def __init__(self, **kw):
Undocumented
def infilter(self, pyval, oself, store):
used to convert a Python value to something that lives in the database; so called because it is called when objects go in to the database. It takes a Python value and returns an SQL value.
def outfilter(self, dbval, oself):
used to convert an SQL value to something that lives in memory; so called because it is called when objects come out of the database. It takes an SQL value and returns a Python value.
def compare(self, other, sqlop):
Override this in a subclass.
API Documentation for vodafone-mobile-connect-card-driver-for-linux, generated by pydoctor at 2008-01-10 13:06:31.